This video from the Norsk Folkemuseum came to my attention last week via a 2015 post at vakerrysta.blogspot.com. I’ve added it to the unorganized collection on my Looping Links page, but had to call it to your attention. Strainers for milk and beer-making have fascinated me since I was first able to borrow Odd Nordland’s book Primitive Scandinavian Textiles in Knotless Netting from interlibrary loan.
You’ll find spinning the hair fiber (I believe) at 6:00, stitching the strainer at 7:50, adding thread at 9:39, and then she pours milk through the strainer.
I’m so grateful for the filmmakers who captured these traditions, the folk museums who preserve them, and the generous souls share these findings!